Global Patent Index - EP 0972236 A4

EP 0972236 A4 20000412 - A SUM OF THE ABSOLUTE VALUES GENERATOR

Title (en)

A SUM OF THE ABSOLUTE VALUES GENERATOR

Title (de)

SCHALTUNG ZUM SUMMIEREN VON ABSOLUTWERTEN

Title (fr)

GENERATEUR DE LA SOMME DE VALEURS ABSOLUES

Publication

EP 0972236 A4 20000412 (EN)

Application

EP 97945074 A 19971020

Priority

  • IL 9700335 W 19971020
  • US 74004696 A 19961023

Abstract (en)

[origin: WO9818073A1] An apparatus (10) for processing sum of the absolute differences (SAD) is disclosed. A novel circuit is disclosed which eliminates the requirement of taking the absolute value of intermediate partial sum results. The absolute value function is only needed after the final summation stage (70). Subtraction units (12) take the difference between each pair of values to be processed. Each summation unit (20) performs an addition on its two inputs while preserving the magnitude of their sum. Depending on the sign of one of the inputs, the two inputs are either added to each other or subtracted from each other. The sign bit of both inputs are checked in order to determine to add or subtract.

IPC 1-7

G06F 7/00; G06F 7/50; G06F 7/544

IPC 8 full level

G06F 7/00 (2006.01); G06F 7/544 (2006.01); G06F 17/10 (2006.01); H04N 7/32 (2006.01)

CPC (source: EP US)

G06F 7/544 (2013.01 - EP US); G06F 2207/5442 (2013.01 - EP US)

Citation (search report)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

WO 9818073 A1 19980430; AU 4636597 A 19980515; CA 2269494 A1 19980430; CN 1238845 A 19991215; EP 0972236 A1 20000119; EP 0972236 A4 20000412; IL 129525 A0 20000229; JP 2000502481 A 20000229; US 5793655 A 19980811

DOCDB simple family (application)

IL 9700335 W 19971020; AU 4636597 A 19971020; CA 2269494 A 19971020; CN 97199956 A 19971020; EP 97945074 A 19971020; IL 12952597 A 19971020; JP 51917698 A 19971020; US 74004696 A 19961023